No matter what the size of the conduit, you always have to derate the conductors accordingly when you have over 3. Correct? So, like most people think, "put a bigger size conduit in and you can pull more wires!" For instance, putting 1/2" EMT in limits the # of conductors that can be pulled because of it's size. But really, even if I put a 1" EMT conduit in I can fit more conductors in but I have to start derating at 4-7 conductors. So even if I put a 2" EMT conduit in and I could physically fit alot of #12 THHN conductors inside I would have to derate the #12 THHN to 80% of its ampacity when I reached 4-7 conductors. If this is not correct please advise. Thanks!
